Plus, the red-wearers also rated themselves as more sexually receptive than those dressed in blue.

To come to this conclusion, researchers asked participants to don either red or blue T-shirts and sit in cubicles outfitted with mirrors. Then, the participants were asked to rate their own attractiveness. Researchers then asked participants to make the same personal-attractiveness rating, but after taking a photo of themselves instead of looking into a mirror.

"We found that people can feel more attractive when putting on red clothes," she explained.

“It might be that the red effect does not work for everybody,” Berthold continued. “Maybe, some (probably insecure) individuals could feel even worse when dressing red, because they might feel that now everybody notices and judges them.”

For most, though, wearing red provides at least a confidence boost. So go ahead — why not slip into a red dress you love and see how sexy it makes you feel?